How do I convert blender render materials to cycles materials in 2.78c?
Cycles doesn't really have textures like Blender Render. The textures in cycles only affect the colour of the shader. If you want to have an image texture in cycles, first you got to go to the materials tab and turn your material into a cycles material. Second you open the compositor of the material you just converted. Normally there should be a diffuse shader node and material output node. You also got to add two other nodes: Texture coordinate and image texture. Connect the image texture node with the colour input of the shader node and the texture coordinate node with the image texture node. Select your image in the image texture node and then it should work, if I haven't forgot something.